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当闭合回路中发生磁通量变化时,由于感应电场的作用使电荷发生定向移动而形成感应电流,在Δt时间内迁移的电量(感应电量)为:q=IΔt=RεΔt=RΔΔφtΔt=ΔRφ从此式可看出感应电量仅由回路总电阻和磁通量变化决定,与发生磁通量变化的时间无关,应用上述结论公式可使某些电磁感应
When a magnetic flux changes in a closed loop, an induced current is formed due to the action of the induced electric field, and the induced current is formed by the charge. The quantity of electricity (inductive charge) that migrates during the time Δt is: q=IΔt=RεΔt=RΔΔttt=ΔRφ can be seen from this equation. The inductive charge is only determined by the total resistance of the loop and the change in magnetic flux, regardless of the time of the change in magnetic flux, applying the above conclusion formula can make certain electromagnetic induction